BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, DECEMBER 4, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND STILL WINDY WITH CLEARER SKIES IN THE AFTERNOON.... Today we observed a good visibility of 70 miles under partly cloudy skies in the afternoon hours. There was a layer of haze that kept visibility down to 35 miles this morning. Wind was significant today, reaching 30 mph. We are seeing wind from the southwest, with an average speed of 15 mph. Pressure started to fall rather quickly since 10 A.M., by almost 4 millibars!   The high so far today is 57F, 14 degrees above the daily normal high of 43F. The low since midnight is 40F, 12 degrees above the normal low of 28F.  Today's Observations: 7 A.M. Weather: Broken altocumulus and cirrostratus Temperature: 43F; Dew Point: 29F; Relative Humidity: 56% Wind: SSW at 15G22 kts, peak of 30 mph at 5:54 A.M. Sea-level pressure: 30.05 in Hg; rising steadily Visibility: 35 miles, hazy 6-hr Max temp: 43F 6-hr Min temp: 40F 24-hr Precip: 0.00 ins. 24-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 110 BKN 220 BKN 35 175/43/29/2015G22/005/ HAZY PK WND 1926/1054/ 8/076 55002 10043 20040 10 A.M. Weather: Broken altocumulus and cirrostratus Temperature: 49F; Dew Point: 33F; Relative Humidity: 58% Wind: SW at 12G19 kts Sea-level pressure: 30.07 in Hg; steady, then rising Visibility: 65 miles 3-hr Precip: 0.00 ins. 3-hr Snow: 0.0 ins. BHO SA 1455 110 BKN 220 BKN 65 181/49/33/2212G19/007/ 8/076 51006 1 P.M. Weather: Scattered altocumulus and cirrostratus Temperature: 56F; Dew Point: 30F; Relative Humidity: 36% Wind: SW at 13G20 kts Sea-level pressure: 29.98 in Hg; falling, then more rapidly Visibility: 70 miles 6-hr Max temp: 57F 6-hr Min temp: 43F 6-hr Precip: 0.00 ins. 6-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 110 SCT 220 SCT 70 149/56/30/2113G20/998/ 8/078 58032 10057 20043 SUMMARY FOR THURSDAY, DECEMBER 3, 2020 TEMPERATURE (DEGREES F) MAX.......57   NORMAL.....44 MIN.......30   NORMAL.....28 MEAN......40   NORMAL.....36 DEPARTURE FROM 30-YEAR NORMAL................... +4 TOTAL DEPARTURE FOR THE MONTH................... +19 [+6.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............25  DEPARTURE.......-4 TOTAL HEATING UNITS FOR THE MONTH...............67  DEPARTURE......-20 TOTAL HEATING UNITS FOR THE SEASON............1040  DEPARTURE.....-308 TOTAL HEATING UNITS LAST SEASON TO DATE.......1350  DEPARTURE.....-310 PEAK WIND GUST FOR YESTERDAY (MPH):                      420C/Official..............25 SSW  AT  9:47 P.M.                      AEROVANE (south tower).....25 SSW  AT  9:43 P.M.                      ASOS.......................26 SSW  AT  9:48 P.M.                      DAVIS #1...................25 WSW  AT  9:47 P.M.                      DAVIS #2 (south tower).....27 SW   AT  9:47 P.M.                      RMY........................28                            VECTOR.....................30                          MERLIN.....................N/A FASTEST MILE FOR YESTERDAY: CONTACTING/OFFICIAL.............................20 SSW  AT   9:34 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................20 SSW  AT   9:02 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............19 SW   AT   9:02 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............20 SW   AT   9:02 P.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL......12.1 SW   [291 total miles]                      ASOS.....................12.8      [307 total miles]                      DAVIS #1.................12.4 SW   [298 total miles]                      DAVIS #2.................13.0 SW   [312 total miles]                      RMY......................12.1      [290 total miles]                      VECTOR...................14.6      [296 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.17                              ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............0.61  DEPARTURE....+0.12                              ASOS.............0.65 TOTAL PRECIPITATION FOR THE YEAR.............47.01  DEPARTURE....-2.01                               ASOS...........47.98 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.3 TOTAL SNOWFALL FOR THE MONTH...................0.0  DEPARTURE.....-0.8 TOTAL SNOWFALL FOR THE SEASON..................6.5  DEPARTURE.....+3.1 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M:    Missing data 11/01   49/36/43/-3/0.69/0.0/006/01      38 W     AERO 40 W    RMY 39 11/02   40/31/36/-10/T/T/425/69          61 WNW   AERO 62 WNW  RMY 62 11/03   43/29/36/-10/0.00/0.0/473/77     48 WNW   AERO 53 WNW  RMY 48 11/04   54/30/42/-3/0.00/0.0/550/90      30 SSW   AERO 30 SSW  RMY 30 11/05   69/49/59/+14/0.00/0.0/548/90     37 SSW   AERO 40 SSW  RMY 38 11/06   72/55/64/+19/0.00/0.0/394/65     28 SW    AERO 28 SW   RMY M 11/07   75/54/65/+20/0.00/0.0/562/93     21 WSW   AERO 21 WSW  RMY 21 11/08   73/54/64/+20/0.00/0.0/584/97     18 W     AERO 18 W    RMY 19 11/09   74/52/63/+19/0.00/0.0/593/99     20 WSW   AERO 18 WSW  RMY 21 11/10   74/53/64/+20/0.00/0.0/597/100    30 SW    AERO 28 SW   RMY 31 11/11   73/58/66/+23/0.04/0.0/.../..     40 SW    AERO 44 SW   RMY 45 11/12   64/46/55/+12/0.04/0.0/.../..     32 NNW   AERO 31 NNW  RMY 33 11/13   48/38/43/0/0.30/0.0/.../..       22 NW    AERO 21 NW   RMY 25 11/14   49/32/41/-1/0.00/0.0/.../..      26 NW    AERO 28 NW   RMY 29 11/15   58/30/44/+2/0.62/0.0/.../..      60 S     AERO 67 S    RMY 65 11/16   53/39/46/+4/0.00/0.0/.../..      40 WNW   AERO 41 WNW  RMY 43 11/17   47/32/40/-1/0.00/0.0/.../..      28 NW    AERO 28 NW   RMY 30 11/18   32/19/26/-15/0.00/0.0/.../..     40 NW    AERO 46 NW   RMY 43 11/19   44/18/31/-10/0.00/0.0/.../..     37 SW    AERO 39 SW   RMY 43     11/20   63/44/54/+14/0.00/0.0/.../..     33 SSW   AERO 35 SSW  RMY 37 11/21   62/40/51/+11/0.00/0.0/.../..     24 W     AERO 23 W    RMY 27 11/22   45/33/39/-1/T/0.0/.../..         28 SE    AERO 28 SE   RMY 31 11/23   58/32/45/+6/1.77/0.0/.../..      42 WNW   AERO 48 WNW  RMY 46 TSTM 11/24   42/27/35/-4/0.00/0.0/.../..      31 WNW   AERO 32 WNW  RMY 33 11/25   50/26/38/-1/0.01/0.0/.../..      23 SSE   AERO 23 SSE  RMY 26 11/26   58/45/52/+14/0.36/0.0/.../..     36 S     AERO 37 S    RMY 41 11/27   53/46/50/+12/0.00/0.0/.../..     23 WNW   AERO 23 WNW  RMY 23 11/28   52/36/44/+6/T/0.0/.../..         28 WNW   AERO 30 WNW  RMY 27 11/29   52/33/43/+6/0.00/0.0/.../..      21 SSW   AERO 21 SSW  RMY 22 11/30   62/40/51/+14/1.35/0.0/.../..     81 SSE   AERO 82 SSE  RMY 86 DAILY RECORDS FOR NOVEMBER 2020 11/06/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 72F,           BREAKS PREVIOUS RECORD OF 71F SET IN 1959 AND 2015 11/07/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 75F,           TIES PREVIOUS RECORD OF 75F SET IN 1938 11/08/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F,           BREAKS PREVIOUS RECORD OF 72F SET IN 1938 11/09/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 74F,           BREAKS PREVIOUS RECORD OF 72F SET IN 1975 11/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 58F,           BREAKS PREVIOUS RECORD OF 56F IN 2002           DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F,           BREAKS PREVIOUS RECORD OF 68F IN 1984 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M:    Missing data 12/01   62/40/51/+14/..../0.0/.../..      60 S    AERO 67 W    RMY 64 12/02   42/32/37/+1/..../.../.../..       32 SW   AERO 32 SW   RMY 35 12/03   49/30/40/+4/0.00/0.0/.../..       25 SSW  AERO 25 SSW  RMY 28 12/04 The low since midnight is 39F, the daily normal low is 28F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR DECEMBER 4 HIGH 67 IN 1998 LOW -4 IN 1940 PRECIP 1.87 INS. IN 1968 SNOWFALL 6.0 INS. IN 1907 PEAK GUST 73 MPH WNW IN 1980 RECORDS FOR DECEMBER 5 HIGH 65 IN 2001 LOW -1 IN 1926 PRECIP 2.86 INS. IN 1993 SNOWFALL 7.0 INS. IN 1926, 1981 PEAK GUST 67 MPH WNW IN 1961, S IN 1973 TODAY'S REPORT PREPARED BY: Benjamin Turner